LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1434 (Body, Lock & Security System) >> Back Door Auto Closure System >> Unlock Sensor Check (Without Intelligent Key)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Unlock Sensor Check (Without Intelligent Key)

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK UNLOCK SENSOR SIGNAL 
    1. Turn ignition switch OFF.
    2. Check voltage between back door closure control unit connector and ground.
      Fig 1: Connector Terminal Reference Chart
      G02363754Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 2: Checking Voltage Between Back Door Closure Control Unit Connector And Ground
      G02363755Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Unlock sensor is OK.
    2. NG : GO TO 2.
  2. CHECK HARNESS CONTINUITY 
    1. Disconnect back door closure control unit and front door lock assembly (passenger side) connector.
    2. Check continuity between back door closure control unit connector D106 terminal 5 and front door lock assembly (passenger side) connector D40 terminal 5.
      1. 5 (W) - 5 (W) : Continuity should exist. 
      Fig 3: Checking Harness Continuity
      G02363756Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : GO TO 3.
    2. NG : Repair or replace harness between back door closure control unit and front door lock assembly (passenger side).
  3. CHECK GROUND CIRCUIT 

    Check continuity between front door lock assembly (passenger side) connector D40 terminal 4 and ground.

    1. 4 (B) - Ground : Continuity should exist. 

    OK or NG 

    1. OK : GO TO 4.
    2. NG : Repair or replace harness.
    Fig 4: Checking Continuity Between Front Door Lock Assembly (Passenger Side) Connector D40 Terminal 4 And Ground
    G02363757Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL 
    1. Connect back door closure control unit connector.
    2. Check voltage between back door closure control unit connector D106 terminal 5 and ground.
      1. 5 (W) - Ground : Approx. 5V 
      Fig 5: Checking Voltage Between Back Door Closure Control Unit Connector D106 Terminal 5 And Ground
      G02363758Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Replace front door lock assembly (passenger side).
    2. NG : Replace back door closure control unit.
scientia non olet · About LEMON Manuals